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XavierTalpe/Math.java

Created November 5, 2012 21:22
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2D rotation around a point
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Math.java
double cosAlpha = Math.cos( angle );
double sinAlpha = Math.sin( angle );
double dX = x - originX;
double dY = y - originY;
double x = originX + cosAlpha * dX - sinAlpha * dY;
double y = originY + sinAlpha * dX + cosAlpha * dY;
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